Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1068

FDC-HKXR
20.5.6 Test run
(1) Before starting operation
(a) Measure resistances between the electrical parts terminal block and grounded area using a 500 V Megger, insulator.
Resistance must be higher than 1 MΩ.
(b) Confirm whether the power source breaker (main switch) of the unit has been turned on for over 12 hours to energize the
crankcase heater in advance of operation.
(c) Make sure that the compressor bottom has been warmed.
(d) Be sure to fully open the service valves (on both the gas and liquid sides) of the outdoor unit. If being operated without
opening, the valve may be got out of order.
Note (1) When the service valve is closed, be sure to check that evacuation is completed or a refrigerant is charged.
(2) Test run
(a) If it is impossible, a test run of indoor units can be conducted by using the switches No. 4 and No. 5 of [SW-3] on
the outdoor unit circuit board irrespective of ON/OFF conditions of CnS and the remote controller.
No. 4 of [Sw3]
Test run
Normal
No. 5 of [Sw3]
[Remark]
This operation has priority over other option commands with the center console.
At the time of trial operation, the maximum frequencies are follows. Protective devices are effectively controlled, and
frequencies are controlled to become smaller.
Models
Maximum frequency
for operation (Hz)
(b) The frequency for operation can be monitored with yellow LEDs on the indoor unit circuit board. Relations between
LED lighting condition and frequency are as follows.
Inverter frequency monitor
LED
3
LED
4
LED
5
Operation
0 ~ 35 35 ~ 45
frequency
CAUTION: After end of a test run order, set No. 4 of [SW3] to OFF
1066
• All connected indoor units operate when the
switch is set to ON.
• Indoor units request the maximum frequency
and the outdoor unit operates with the maxi-
mum frequency shown in the table below ac-
cording to requests from indoor units.
• Select cooling or heating according to input to
No. 5 of [SW3].
• Turn this on makes it possible to conduct cool-
ing operation when [SW3] No. 4 is turned on.
FDCP2001HKXRE2 FDCP2501HKXRE2
95
45 ~ 55 55 ~ 65 65 ~ 75
• When the switch is set to OFF, these units
can be operated with the remote controller
or by external input.
• Turning this off makes it possible to conduct heat-
ing operation when [SW3]'s No. 4 is turned off.
95
75 ~ 85 85 ~ 95 95 ~ 110
Notes (1) mark: Flashing
mark: Stays OFF
(2) Relation between LED
and operation frequency
• LED 40 Hz
3 ..........
• LED 20 Hz
4 ..........
• LED 10 Hz
5 ..........
• Operation frequency =
Frequency indicated by
LED + 25
3 ~ 5
3 ~5